/*******************************************************************************
* Copyright (c) 2011, Daniel Murphy
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
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* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the <organization> nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
******************************************************************************/
/**
* Created at 4:25:42 AM Jul 15, 2010
*/
package org.jbox2d.callbacks;
import org.jbox2d.dynamics.Filter;
import org.jbox2d.dynamics.Fixture;
// updated to rev 100
/**
* Implement this class to provide collision filtering. In other words, you can implement
* this class if you want finer control over contact creation.
* @author Daniel Murphy
*/
public class ContactFilter {
/**
* Return true if contact calculations should be performed between these two shapes.
* @warning for performance reasons this is only called when the AABBs begin to overlap.
* @param fixtureA
* @param fixtureB
* @return
*/
public boolean shouldCollide(Fixture fixtureA, Fixture fixtureB){
Filter filterA = fixtureA.getFilterData();
Filter filterB = fixtureB.getFilterData();
if (filterA.groupIndex == filterB.groupIndex && filterA.groupIndex != 0){
return filterA.groupIndex > 0;
}
boolean collide = (filterA.maskBits & filterB.categoryBits) != 0 &&
(filterA.categoryBits & filterB.maskBits) != 0;
return collide;
}
}